<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width,user-scalable=no,initial-scale=1.0">
    <style>
          a{
               display: block;
               width: 40px;
               height: 40px;
              /*在移动端点击，默认有一个背景色*/
               -webkit-tap-highlight-color: transparent;
          }

    </style>
</head>
<body>

        <a href="">中国</a>
</body>
</html>